TWI479219B - Camera module and method for assemblying the same - Google Patents

Description

Camera module and assembly method thereof

The invention relates to a camera module and an assembly method thereof.

A general camera module includes a lens, a lens holder that houses the lens, and a substrate. An image sensing component is disposed on the substrate for converting an optical signal from the lens into an electrical signal. During assembly, the lens is first mounted in the lens holder, and then the substrate is positioned at a predetermined position by using a jig, and the substrate is mounted on the lens holder by surface adhesion technology, thereby encapsulating the lens holder and the substrate together to form a camera module.

In the above assembly process, the position of the substrate is preset, however, there may be installation errors when the lens is mounted in the lens holder, causing the center of the image sensing element on the substrate to deviate from the center of the lens, affecting the image quality, or causing defective products. increase.

In view of the above, it is necessary to provide a high quality camera module and an assembly method thereof.

A camera module includes a lens assembly and a substrate assembly mounted on the lens assembly. The lens assembly includes a lens, a lens barrel housing the lens, and a lens holder housing the lens barrel. The substrate assembly includes a plate body and an image sensing element mounted on a surface of the plate body. A recess is formed in an outer wall of the mirror base near the end of the plate body.

A method for assembling a camera module, comprising the steps of: providing a lens assembly, The lens assembly includes a lens, a lens barrel for accommodating the lens, and a lens holder for accommodating the lens barrel. The outer wall of the lens holder is provided with a notch near the end; a substrate assembly is provided, the substrate assembly includes a plate body and a surface of the plate body An image sensing element for receiving an optical signal from the lens and converting the optical signal into an electrical signal; providing a contact holder for supporting the plate body, the contact block comprising a probe electrically separably connected to the plate body Providing a movable fixture, the movable clamp comprises a first clamp specific and a second clamp specific; the first clamp specifically presses the plate body, and the first clamp is specifically positioned on the plate body, and the first clamp has a specific shape and the concave shape Corresponding to the mouth; the second clip can specifically clamp and move the lens holder, and the lens holder is placed on the board body, the first clip is at least partially received in the recess; and an image display device, the image display device and the image display device are provided The contact base is connected to display the electrical signal converted by the image sensing component as an image; the movable fixture fine-tunes the relative position of the lens component and the substrate component according to the image quality displayed by the image display device to align the lens and Image sensing element; plate fixed on the lens module.

The assembly method of the camera module uses the image display device to monitor the imaging quality in real time, and uses the movable fixture to finely adjust the relative position of the image sensing component and the lens component according to the imaging quality, thereby aligning the image sensing component and the lens, and improving the assembled image. Module quality. Moreover, during the assembly process, the first clamp specifically presses the plate body, which can offset the abutting force of the probe, and avoid displacement or breakage of the plate body during assembly, which is beneficial to improve the quality in assembly and manufacture. The lens holder of the camera module is provided with a recess for receiving the first clip. During the assembly process, the first clip can be specifically accommodated in the recess to facilitate assembly of the board and the mirror base.

100‧‧‧ camera module

10‧‧‧ lens assembly

20‧‧‧Substrate components

21‧‧‧ lenses

23‧‧‧Mirror tube

231‧‧‧Light hole

25‧‧‧Mirror base

250‧‧‧ accommodating chamber

251‧‧‧ notch

26‧‧‧ Filters

27‧‧‧ board

271‧‧‧Contact film

29‧‧‧ Passive components

28‧‧‧Image sensing components

30‧‧‧Activity fixture

31‧‧‧ first clip specific

32‧‧‧Second clip specific

50‧‧‧Contacts

501‧‧‧ base

503‧‧‧ probe

5031‧‧‧Cylinder

5033‧‧ ‧ spring

5035‧‧‧ probe

5036‧‧‧Limited

5037‧‧‧Connecting Department

5038‧‧‧Fixed Department

5039‧‧‧Contacts

505‧‧‧ circuit board

51‧‧‧Image display device

1 is a cross-sectional view showing the assembly of a camera module by using the assembly method of the camera module of the present invention.

The camera module of the present invention and the assembly method thereof will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 , the camera module 100 to be assembled according to the present invention includes a lens assembly 10 and a substrate assembly 20 . The lens assembly 10 includes a lens 21, a lens barrel 23 housing the lens 21, a lens holder 25 housing the lens barrel 23, and a filter 26. The lens 21 is fixed in the lens barrel 23. A light-transmitting hole 231 is defined in one end of the lens barrel 23, and the lens holder 25 is provided with a receiving cavity 250 at one end opening thereof for receiving the filter 26. The filter 26 is mounted on the bottom wall in the accommodating chamber 250. An external thread (not shown) is formed on the outer wall of the lens barrel 23. The inner wall of the lens holder 25 is formed with an internal thread corresponding to the external thread of the lens barrel 23, and the lens barrel 23 is mounted in the lens holder 25 by screwing. The lens barrel 23 has one end of the light transmission hole 231 away from the filter 26, thereby encapsulating the lens assembly 10. The substrate assembly 20 includes a board body 27 and image sensing elements 28 on one surface of the board body 27 and passive elements 29 on opposite sides of the image sensing element 28. Passive component 29 can be a resistor, capacitor, inductor, or the like to enhance the functionality of substrate assembly 20. The substrate assembly 20 is mounted on the end of the lens barrel 23 adjacent to the filter 26, and the image sensing component 28 and the passive component 29 are located in the accommodating cavity 250, so that light can enter from the light transmission hole 231, and sequentially pass through the lens 21 and the filter 26. Thereafter, the other end of the lens barrel 23 is ejected onto the image sensing element 28 of the substrate assembly 20. The filter 26 filters out infrared light to improve imaging. Of course, the filter 26 can be set or omitted according to actual needs. A recess 251 is defined in the outer wall of the mirror base 25 adjacent to the end for receiving the movable clamp 30.

The assembling method of the camera module of the present invention comprises the steps of providing the packaged lens assembly 10, and the outer wall of the lens holder 25 of the lens assembly 10 is provided with a notch 251.

A substrate assembly 20 is provided. The substrate assembly 20 includes a plate body 27 and an image sensing element 28 on a surface of the plate body 27. The board body 27 is a circuit board, and the image sensing element 28 and the board body 27 are connected by wires (not shown). The other side surface of the board body 27 away from the image sensing element 28 is provided with two spaced contact strips 271 for connecting with a motherboard (not shown) or other image signal display device and transmitting signals.

A movable clamp 30 is provided. In the present embodiment, the movable clamp 30 includes a first clamp specific 31 and a second clamp specific 32. The first clip portion 31 is for pressing the plate body 27, and has a shape corresponding to the notch 251 of the lens holder 25, and can be at least partially accommodated in the recess 251. The second clip 32 is used to hold the mirror mount 25.

A contact holder 50 and an image display device 51 are provided. The contact base 50 includes a base 501, two probes 503, and a circuit board 505. The probe 503 includes a barrel 5031, a spring 5033 housed in the barrel 5031, and a probe 5035. The middle portion of the cylinder 5031 is located in the base 501, and both ends are exposed outside the base 501. One end of the cylindrical body 5031 is bent inward to form a limiting portion 5036, and the other end is formed with a connecting portion 5037 that closes the cylindrical body 5031. The probe 5035 includes a fixing portion 5038 and a contact portion 5039. The diameter of the fixing portion 5038 is substantially equal to the inner diameter of the cylinder 5031, and the diameter of the contact portion 5039 is smaller than the diameter of the fixing portion 5038. One end of the spring 5033 is fixed to one end of the fixing portion 5038 away from the contact portion 5039, and the other end is fixed to the connecting portion 5037. The spring 5033 abuts the probe 5035 such that the contact portion 5039 passes through the limiting portion 5036 and protrudes outside the cylindrical body 5031. Due to the blocking of the limiting portion 5036, the probe 5035 will not be able to escape from the barrel 5031. The circuit board 505 and the image display device 51 are connected by wires. In the present embodiment, the video display device 51 is a computer.

The substrate assembly 20 is placed on the contact base 50. The contact base 50 supports the substrate assembly 20. Each contact piece 271 is in contact with a probe 503. The first clamp member 31 is pressed against the plate body 27 to mount the image sensing element 28 thereon. Positioning the substrate assembly 20 on the contact seat 50 on the surface And the contact piece 271 is in close contact with the probe 503. The first clip specific 31 can offset the abutting force of the probe 503, and ensure the displacement or breakage of the substrate assembly 20 while ensuring the contact between the contact piece 271 and the probe 503, thereby improving the reliability of assembly.

The lens assembly 10 is dropped onto the plate body 27 by the second clamp body 32 holding the lens holder 25 to a position above the lens assembly 10 substantially aligned with the image sensing element 28, and the inner portion of the first clip body 31 is received in the concave portion. The contact between the lens holder 25 and the plate body 27 is not affected in the port 251. At this time, the two probes 503 of the contact base 50 respectively abut the two contact pieces 271 of the plate body 27 to be electrically connected thereto, and the optical information of the external image entering from the light transmission hole 231 of the lens barrel 23 passes through the lens 21 in sequence. After the filter is applied to the image sensing device 28 and converted into electrical information, it is transmitted to the image display device 51 via the board 27, the probe 503, and the circuit board 505 of the contact holder 50. The first clip 31 and the second clip 32 are operable to fine-tune the relative positions of the lens 21 and the image sensing element 28 of the lens assembly 10 by the image quality displayed by the image display device 51. When the image quality displayed by the image display device 51 is optimal, that is, the lens 21 is completely aligned with the image sensing element 28. The movable jig 30 positions the lens assembly 10 and the plate body 27, and mounts the plate body 27 on the mirror base 25 of the lens assembly 10. The camera module 100 is obtained by removing the movable jig 30 and the contact holder 50. The manner in which the plate body 27 is mounted on the lens holder 25 can be surface-adhesive or other fixing means.

The assembly method of the camera module of the present invention monitors the imaging quality in real time by using the image display device 51, and finely adjusts the relative positions of the image sensing component 28 and the lens assembly 10 by using the movable fixture 30 according to the imaging quality to align the image sensing component 28 and the lens 21. Improve the yield and quality of the assembled camera module 100.

The assembly method uses the first clamp member 31 to press the plate body 27 to prevent the plate body 27 from being displaced or broken in the first clamp body 31 by the abutting force of the probe 503, thereby improving the assembly yield and quality. . The lens holder 25 is provided with a notch corresponding to the first clip body 31 251. When installed, the first clip body 31 can be at least partially received in the recess 251. During the assembly process, the lens holder 25 can be prevented from being blocked, so that the mirror base 25 can be contacted and mounted together on the board body 27 for convenient assembly.

The shape, position, number, and the like of the notch 251 of the lens holder 25 can be appropriately adjusted corresponding to the first clip specific 31 according to actual needs.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧ camera module

10‧‧‧ lens assembly

20‧‧‧Substrate components

21‧‧‧ lenses

23‧‧‧Mirror tube

231‧‧‧Light hole

25‧‧‧Mirror base

250‧‧‧ accommodating chamber

251‧‧‧ notch

26‧‧‧ Filters

27‧‧‧ board

271‧‧‧Contact film

29‧‧‧ Passive components

28‧‧‧Image sensing components

30‧‧‧Activity fixture

31‧‧‧ first clip specific

32‧‧‧Second clip specific

50‧‧‧Contacts

501‧‧‧ base

503‧‧‧ probe

5031‧‧‧Cylinder

5033‧‧ ‧ spring

5035‧‧‧ probe

5036‧‧‧Limited

5037‧‧‧Connecting Department

5038‧‧‧Fixed Department

5039‧‧‧Contacts

505‧‧‧ circuit board

51‧‧‧Image display device

Claims (9)

A camera module includes a lens assembly and a substrate assembly mounted on the lens assembly, the lens assembly including a lens, a lens barrel housing the lens, and a lens holder accommodating the lens barrel, the substrate assembly including a plate body and mounted thereon The image sensing component on one surface of the board body is improved in that: the outer wall of the lens holder is provided with a notch near the end of the board body, wherein the substrate assembly is further disposed on the board body for connecting with the external motherboard The contact piece is located on a surface of the plate body away from the image sensing element. The camera module of claim 1, wherein the lens barrel is mounted in the lens holder by a threaded fit. The camera module of claim 1, wherein the lens assembly further comprises a filter between the lens and the image sensing element. The camera module of claim 3, wherein the lens holder has a receiving cavity for receiving the filter. The camera module of claim 4, wherein the substrate assembly further comprises a passive component disposed on the board and located on the side of the image sensing component. A method for assembling a camera module, comprising the steps of: providing a lens assembly, comprising: a lens, a lens barrel accommodating the lens, and a lens holder accommodating the lens barrel; providing a substrate assembly, the substrate assembly comprising a plate body And an image sensing component on a surface of the board for receiving an optical signal from the lens and converting the optical signal into an electrical signal; the improvement is that the outer wall of the lens holder is located near the end of the plate body. a notch; the assembly method of the camera module further includes: Providing a contact seat for supporting the board body, the contact seat comprising a probe detachably electrically connected to the board body; providing a movable fixture, the movable clamp comprising a first clip specific and a second clip specific, the first The clip is specifically pressed against the plate body, and the first clip is specifically positioned on the plate body, the first clip has a specific shape corresponding to the notch, and the second clip specifically clamps and moves the lens holder, The lens holder is disposed on the board body, the first clip is at least partially received in the recess; and an image display device is provided, the image display device is connected to the contact base and the electrical signal converted by the image sensing element is Displaying as an image; the movable fixture fine-tunes the relative position of the lens component and the substrate component according to the image quality displayed by the image display device to align the lens and the image sensing component; fixing the plate body to the lens component on. The method for assembling a camera module according to claim 6, wherein the plate body is mounted on the lens holder by surface adhesion. The method for assembling a camera module according to claim 6, wherein the probe comprises a cylinder, a probe disposed in the cylinder, and a spring located in the cylinder and abutting the probe, the probe supporting the plate And electrically connected to the plate body separately. The method of assembling a camera module according to claim 8, wherein the plate body is provided with a contact piece for connecting to the probe on the other surface away from the image sensing element.